[Payments] Add metric for when Pr UI is skipped.

chrome/test/data/payments/metrics.js

 /*
  * Copyright 2016 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /* global PaymentRequest:false */
 
 var request;
 
@@ skipping 35 matching lines @@
         // No changes in price based on shipping address change.
         resolve(details);
       }));
     })
   } catch (error) {
     print(error.message);
   }
 }
 
 /**
- * Launches the PaymentRequest UI which accepts only Android Pay.
+ * Launches the PaymentRequest UI which accepts only Android Pay and does not

[please use gerrit instead, 2017/04/13 13:49:47]

It's better to add a new function than altering the old one. The old one is
still being used in tests, which will cause one of the existing tests to fail.

[sebsg, 2017/04/13 19:45:56]

Done.

+ * require any other information.
  */
 function androidPayBuy() {  // eslint-disable-line no-unused-vars
   try {
     request = new PaymentRequest(
         [{supportedMethods: ['https://android.com/pay']}], {
           total: {label: 'Total', amount: {currency: 'USD', value: '5.00'}},
-          shippingOptions: [{
-            id: 'freeShippingOption',
-            label: 'Free global shipping',
-            amount: {currency: 'USD', value: '0'},
-            selected: true
-          }]
-        },
-        {requestShipping: true});
+        });
     request.show()
         .then(function(resp) {
           return resp.complete('success');
         }).then(function() {
           print(JSON.stringify(resp, undefined, 2));
         }).catch(function(error) {
           print(error);
         });
   } catch (error) {
     print(error.message);
@@ skipping 37 matching lines @@
   try {
     request.abort().then(function() {
       print('Aborted');
     }).catch(function() {
       print('Cannot abort');
     });
   } catch (error) {
     print(error.message);
   }
 }